TW201530408A - Transparent electrode layer, touch panel and electronic device - Google Patents

Abstract

A transparent electrode layer includes plural touch units. Each of the touch units includes a sensing part and a wiring part. The sensing part has at least one dummy slit. The wiring part is electrically connected to the sensing part, and includes at least one conductor line and at least one slit. The at least one conductor line and the at least one slit are alternately formed in the wiring part. A density ratio, in a range between 0.5 and 2, is determined by a sensing part density parameter and a wiring part density parameter.

Description

Transparent electrode layer, touch panel and electronic device

The present invention relates to a transparent electrode layer, a touch panel, and an electronic device, and more particularly to a transparent electrode layer having a dummy slit region, a touch panel, and an electronic device.

The touch panel combines a display panel with a touch function. The touch function can be provided according to different sensing principles, such as resistive, capacitive, infrared, and the like.

Please refer to FIG. 1 , which is a side view of the touch panel. As can be seen from the figure, the touch panel 1 includes a lower polarizing plate 18, a thin film transistor (TFT) substrate 19, a liquid crystal layer 17, a color filter substrate 15, and an upper polarized light. Plate 13, protective glass 11. In addition, the transparent electrode 11 disposed on the upper polarizing plate 13 is used to provide a touch function.

In order to maintain the display function, the touch panel 1 needs to use a transparent conductive oxide (Transparent Conductive Oxide, TCO for short) which has both transparent and conductive properties as an electrode material on the touch panel. For example, the transparent electrode 12 is often made of an indium-tin oxide electrode (ITO).

In order to provide a positioning function of the touch point, the transparent electrodes 12 are arranged in the upper polarizing plate 13. Therefore, the respective transparent electrodes are spaced apart from each other. Although the transparent electrode 12 has a light transmitting property, the position where the transparent electrode 12 is disposed still affects the transmittance of 7%. In other words, the arrangement of the transparent electrodes 12 still affects the light transmission effect of the touch panel 1.

In Fig. 1, the light beam L1 directly penetrates the upper polarizing plate 13, and the light beam L2 is transmitted through the transparent electrode 12. Due to the poor light transmission effect of the transparent electrode 12, the light beam L1 appears to be brighter than the light beam L2.

Please refer to FIG. 2, which is a schematic diagram of a conventional touch panel display image. When the touch panel displays an image, the arrangement of the transparent electrodes 12 may cause the viewer to actually see a non-uniform picture. In other words, the conventional touch panel 1 has a problem of visual effects. Therefore, how to balance the provision of the touch function and reduce the influence of the transparent electrode on the display effect is a problem to be solved.

The present invention relates to a transparent electrode layer, a touch panel, and an electronic device, and more particularly to a transparent electrode layer having a dummy slit region, a touch panel, and an electronic device.

According to a first aspect of the present invention, a transparent electrode layer includes a plurality of touch units, and a first touch unit of the touch units includes: a touch portion having at least one dummy slit region; The wire portion is electrically connected to the touch portion, wherein the wire portion includes at least one wire and at least one wire slit region which are staggered, and the density of the touch portion is divided by a density parameter of the wire portion to determine a density. The parameter is between 0.5 and 2.

According to a second aspect of the present invention, a touch panel includes: a display layer; and a transparent electrode layer disposed above the display layer, the transparent electrode layer comprising: a plurality of touch units, the touches The first touch unit of the unit includes: a touch portion having at least one dummy slit region; and a wire portion electrically connected to the touch portion, wherein the wire portion includes at least one wire interlaced with At least one wire slit region is determined by dividing a touch portion density parameter by a wire portion density parameter, and the density parameter is between 0.5 and 2.

According to a third aspect of the present invention, an electronic device includes: a touch panel comprising: a display layer; and a transparent electrode layer disposed above the display layer, the transparent electrode layer comprising: a plurality of touches The first touch unit of the touch unit includes: a touch portion having at least one dummy slit And a wire portion electrically connected to the touch portion, wherein the wire portion includes at least one wire and at least one wire slit region which are staggered, and a touch portion density parameter is divided by a wire portion density parameter One of the density parameters is determined to be between 0.5 and 2; and a controller is electrically connected to the touch panel, which performs a touch process.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

1‧‧‧ touch panel

18‧‧‧Lower polarizer

19‧‧‧TFT substrate

17‧‧‧Liquid layer

15‧‧‧Color film substrate

13‧‧‧Upper polarizer

11‧‧‧protective glass

12‧‧‧Transparent electrode

22, 53‧‧‧ transparent electrode layer

231‧‧‧First touch unit

232‧‧‧Second touch unit

233‧‧‧ Third touch unit

23,331, 431, 531, 631, 731, 831, 931‧‧ ‧ touch unit

231a‧‧‧First lead section

231b‧‧‧First Touch Department

232a‧‧‧Second wire section

232b‧‧‧second touch unit

233a‧‧‧ Third lead section

233b‧‧‧3rd touch unit

231a_s1, 232a_s1, 232a_s2, 233a_s1, 233a_s2, 233a_s3, 331a_s, 431a_s, 631a_s‧‧‧ wire slit region

231a_c1, 232a_c1, 232a_c2, 233a_c1, 233a_c2, 233a_c3, 331a_c, 431a_c, 631a_c‧‧‧ wires

331b, 431b, 531b, 631b‧‧‧ touch section

331a, 431a, 531a, 631a‧‧‧ lead wire

331c, 431c‧‧‧ original slit area

431b_s‧‧‧Dummy slit area

50‧‧‧Electronic devices

51‧‧‧ Controller

52‧‧‧Display layer

53‧‧‧ Trackpad

TX‧‧‧Transmission Sensing Area

RX‧‧‧ receiving sensing area

Figure 1, which is a side view of a touch panel.

Fig. 2 is a schematic view showing a conventional touch panel display image.

Figure 3 is a graphical representation of contrast sensitivity versus spatial frequency.

Figure 4 is a schematic view of a transparent electrode layer.

Figure 5A is a schematic diagram of a conventional touch unit.

FIG. 5B is a schematic diagram of a touch unit according to an embodiment of the present invention.

Figure 6A is a schematic view of another conventional touch unit.

FIG. 6B is a schematic diagram of a touch unit according to another embodiment of the present invention.

Figure 7A is a list of the extent to which the density ratio change improves the light transmission effect.

Fig. 7B is a schematic view showing a change in the light transmittance effect improvement ratio with respect to the density ratio.

Figure 8 is a schematic view showing slit regions in the touch unit having different widths.

Figure 9 is a diagram of three touch units having dummy slit regions in accordance with the present invention.

Figure 10 is a schematic diagram of an electronic device having a touch function.

Figure 11 is a schematic diagram comparing the sensitivity versus spatial frequency by comparing conventional techniques with the practice of the present invention.

As described above, the arrangement of the transparent electrodes reduces the light transmittance of the touch panel. That is, setting the transparent electrode will affect the display effect and uneven brightness. to this end, The invention provides a transparent electrode layer, a touch panel and an electronic device. The touch panel includes a display layer and a transparent electrode layer, and the transparent electrode layer is disposed above the display layer. The display layer may be a liquid crystal layer, an electrophoretic layer (EPD), or a Cholesteric Liquid Crystal Display (CLCD). The transparent electrode layer includes a plurality of touch units. Each touch unit includes a touch portion and a wire portion. Furthermore, a plurality of dummy slit regions are formed on the touch portion. By providing a dummy slit region in the transparent electrode layer, the contrast sensitivity of the user when viewing the touch panel is reduced. As the contrast sensitivity is reduced, the transmittance of the touch panel is improved.

See Figure 3, which is a plot of contrast sensitivity versus spatial frequency. The vertical axis of this graph represents the contrast sensitivity and the horizontal axis represents the spatial frequency. The upper side of the vertical axis represents a case where the contrast sensitivity is low; the lower side of the vertical axis represents a case where the contrast sensitivity is high. This figure illustrates the difference in the degree of resolution of the naked eye when the spatial frequency and contrast sensitivity change.

When the contrast sensitivity is higher, the naked eye is easier to distinguish the difference; the lower the contrast sensitivity, the smaller the eye is less likely to distinguish the difference. Furthermore, the lower the spatial frequency, the easier it is for the naked eye to distinguish the difference; the higher the spatial frequency, the smaller the eye is less likely to distinguish.

If the contrast sensitivity is high and the spatial frequency is low, the user's naked eye is easier to feel. When the spatial frequency becomes high, the visual effect seen by the user moves relative to the right side of the third figure. For example, position B is moved by position A. On the other hand, if the contrast sensitivity is reduced, the visual effect seen on behalf of the user moves relative to the top of the third figure. For example, position C is moved by position A.

According to the concept of the present invention, by simplifying the slit region in the transparent electrode layer, the contrast sensitivity of the user when viewing the touch panel can be reduced. Accordingly, the touch panel can provide a better display effect.

Please refer to FIG. 4, which is a schematic diagram of a transparent electrode layer. The transparent electrode layer 22 of Fig. 4 is applied to a touch panel.

The transparent electrode layer 22 generally presents a rectangular shape. The first side I and the third side III of the rectangle are parallel to each other, and the second side II and the fourth side IV of the rectangle are parallel to each other. Which number One side I is perpendicular to the second side II. In order to determine the position of the touch point, the touch units 23 of the transparent electrode layer 22 are arranged in an array. When the touch point is generated, the transparent electrode layer will generate a touch signal, which is used as a coordinate corresponding to the touch position. For example, if the transparent electrode layer includes M columns and N rows of touch units 23, M*N corresponding coordinate values can be provided.

For convenience of explanation, the three touch units 23 on the upper right side of the transparent electrode layer are enlarged to the right side of FIG. 4 . The three touch units are defined as the first touch unit 231, the second touch unit 232, and the third touch unit 233. Each touch unit includes a wire portion and a touch portion. The first touch unit 231 includes a first lead portion 231a and a first touch portion 231b; the second touch unit 232 includes a second lead portion 232a and a second touch portion 232b; and the third touch unit 233 includes The three lead portions 233a and the third touch portion 233b.

The touch portion is configured to sense the position of the touch point and correspondingly generate an electrical change, and the lead portion transmits the touch signal represented by the electrical change generated by the corresponding touch portion to the controller. After that, the controller performs the touch process according to the touch signal.

For each touch unit, the width of the touch portion is wider than that of the wire portion. Therefore, the area of each touch portion is larger than the area of the corresponding wire portion. For example, the area of the lead portion 231a of the first touch unit 231 is smaller than the area of the touch portion 231b of the first touch unit 231, and the like.

Wherein, the wires in each wire portion start from near the fourth side edge IV and extend in a direction parallel to the first side edge I to be close to the second side edge II. That is, it is assumed here that the wires in the wire portion are all connected to the second side II in parallel with the direction of the first side I. Wherein, between the wires, and between the wires and the touch portion, a wire slit region is formed correspondingly.

As can be seen from FIG. 4, the wire portion of the first touch unit 231 has a wire 231a_c1. In addition, a wire slit region 231a_s1 is formed between the wire 231a_c1 and the first touch portion 231b.

The lead portion of the second touch unit 232 has two wires 232a_c1, 232a_c2. a narrow wire is formed between the two wires 232a_c1, 232a_c2 Seam area 232a_s1. Furthermore, a wire slit region 232a_s2 is formed between the wire 232a_c2 and the second touch portion 232b.

And, the lead portion of the third touch unit 233 has three wires 233a_c1, 233a_c2, 233a_c3. As can be seen from Fig. 4, two wire slit regions 233a_s1, 233a_s2 are formed between the three wires 233a_c1, 233a_c2, 233a_c3. Furthermore, a wire slit region 233a_s3 is formed between the wires 233a_c3 and the third touch portion 233b.

Among the M touch units in the same row, the wire portion of the touch unit closest to the second side II has M wires and M wire slit regions, and the wire portion of the touch unit closest to the fourth side Has 1 wire and 1 wire slit area. In other words, among the M touch units in the same row, the touch unit closer to the fourth side IV has a smaller number of wires; and the touch unit closer to the second side II has a larger number of touch units. wire.

According to the concept of the present invention, a dummy slit is further added to the first touch portion 231b, the second touch portion 232b, and the third touch portion 233b of the touch unit. The number of dummy slit regions additionally configured for each touch portion is not equal. For example, it is assumed that the touch portion 231b of the first touch unit 231 has a dummy slit region 231b_s1; it is assumed that the touch portion 232b of the second touch unit 232 has two dummy slit regions 232b_s1, 232b_s2; The touch portion 233b of the touch unit 233 has three dummy slit regions 233b_s1, 233b_s2, 233b_s3.

In this embodiment, the number of dummy slit regions provided in each of the touch portions is adjusted according to the number of the wire slit regions of the corresponding wire portions. As shown in FIG. 4, the first lead portion 231a has a wire slit region, and the first touch portion 231b has a dummy slit region. Furthermore, the second wire portion 232a has two wire slit regions, and the second touch portion 232b has two dummy slit regions. Further, the third wire portion 233a has three wire slit regions, and the third touch portion 233b has three dummy slit regions.

As described above, the number of dummy slit regions of the touch portion depends on the number of wires of the wire portion corresponding thereto. Since the number of slit regions of the wire varies depending on the position of the wire portion, the number of dummy slit regions provided for each touch portion is also different.

When the dummy slit region is set in the touch portion, the light transmittance of the transparent electrode layer is changed. degree. Therefore, the display effect of the touch panel can be adjusted through the setting of the dummy slit area. In practical applications, the number, size, and area of the dummy slit areas can be adjusted according to the application.

Please refer to FIG. 5A, which is a schematic diagram of a conventional touch unit. The conventional touch unit 331 includes a touch portion 331b and a lead portion 331a. It is assumed that the wire portion includes 13 wires 331a_c and 13 wire slit regions 331a_s. Further, it is assumed that the touch portion 331b includes five original slit regions 331c.

The touch portion 331b includes a transfer sensing area TX and a receiving sensing area RX. When the user touches the surface of the touch panel and forms a touch point, an electrical change is generated between the transfer sensing area TX and the receiving sensing area RX. The electrical change can be: capacitance change, resistance change or voltage change.

Please refer to FIG. 5B , which is a schematic diagram of a touch unit according to an embodiment of the invention. The touch unit 431 includes a touch portion 431b and a lead portion 431a. It is assumed that the wire portion includes 13 wires 431a_c and 13 wire slit regions 431a_s. In addition, the touch portion 431b has a plurality of dummy slit regions 431b_s in addition to the five original slit regions 431c. The dummy slit region 431b_s is an independent and hollow slit.

The dummy slit region 431b_s is used to improve the light transmission effect. As shown in FIG. 5B, the touch slit regions 431b_s are evenly distributed on the transfer sensing region TX of the touch portion 431b and the receiving sensing region RX.

Incidentally, the width of each wire is adjusted according to the relative distance between the starting point of each wire and the second side. For example, the wire 431a_c located at the left side in the figure is a starting point from a touch unit that is farther from the second side II (closer to the fourth side IV). The wire 431a_c located at the right side of the figure is the starting point of the touch unit which is closer to the second side II (farther from the fourth side IV). In other words, the width of the wires 431a-c is decremented from left to right. The change in wire width is such that the time for conducting electrical changes to the controller is approximately equal.

In this embodiment, the wires 431a-c exhibit a wavy appearance and are parallel to each other. Further, the wire slit region 431a_s, the original slit region 431c, and the dummy slit region 431b_s are parallel to each other. Further, the wire slit region 431a_s, the original slit region 431c, and the dummy slit region 431b_s They are also wave appearances. The reason for using the wave design is to prevent the generation of moire.

Please refer to FIG. 6A, which is a schematic diagram of another conventional touch unit. The touch unit 531 includes a lead portion 531a and a touch portion 531b. The touch portion 531b includes a ground sensing region (Gnd), two transmission sensing regions TX, and two receiving sensing regions RX.

Please refer to FIG. 6B , which is a schematic diagram of a touch unit according to another embodiment of the present invention. In this embodiment, the touch unit 631 includes a wire portion 631a and a touch portion 631b. The dummy slit region 631c in a wavy dotted pattern is evenly distributed on the ground sensing region (Gnd) of the touch portion 631b, the transfer sensing region TX, and the receiving sensing region RX. The wires 631a_c and the wire slit regions 631a_s which are staggered with each other are provided on the wire portion 631a.

In the 5A, 5B diagram, the width of the wire is decremented. On the other hand, in the 6A, 6B drawings, the widths of the wires are symmetrical and substantially equal to each other.

According to the concept of the present invention, the touch portion density parameter D_tp is defined according to the area Ab of the touch portion and the number Nb_s of the dummy slit regions and the number Nc of the original slit regions. For example, the touch portion density parameter D_tp is defined as: the sum of the number Nb_s of the dummy slit regions and the number Nc of the original slit regions (Nb_s+Nc), and the ratio of the area of the touch portion Ab, that is, D_tp=( Nb_s+Nc)/Ab.

Similarly, the wire portion density parameter D_con can be defined according to the area Aa of the wire portion and the number Na_s of the wire slit region. For example, the wire portion density parameter D_con is defined as the ratio of the number of wire slit regions Na_s to the wire portion area Aa, that is, D_con=Na_s/Aa.

Next, a density ratio parameter R is defined by the touch portion density parameter D_tp and the wire portion density parameter D_con. For example, the density ratio parameter R is defined as a ratio of the touch portion density parameter D_tp to the wire portion density parameter D_con. That is, R = D_tp / D_con. As described above, the area Aa of the wire portion, the number of wire slit regions Na_s, the number of original slit regions Nc, and the area Ab of the touch portion are known and determined. When the number Nb_s of the dummy slit regions is adjusted, the density ratio parameter R is adjusted accordingly. On the contrary, after setting the desired density ratio parameter R, the number Nb_s of the dummy slit regions can be calculated accordingly.

See Figure 7A for a list of the improvement in the ratio of density to light transmission. When the density ratio parameter R is 20% or 200%, the light transmission effect is slightly improved; when the density ratio parameter R is 45% or 170%, the light transmission effect is better; and, when the density ratio parameter is When 60%, 100% or 130%, the light transmission effect is optimal.

Please refer to FIG. 7B, which is a schematic diagram showing the change of the light transmission effect improvement ratio with respect to the density ratio. It can be seen from the figure that the closer the density ratio parameter R is to 100%, the better the light transmission effect of the touch panel of the present invention. For example, when the density ratio parameter R is between 60% and 140%, the improvement of the light transmission effect of the touch panel can be increased by 50%. Moreover, when the density ratio parameter R is about 100%, the light transmission effect of the touch panel can be improved by 150%. According to this, it can be known that when the touch portion density parameter D_tp approaches the wire portion density parameter D_con, the transparent electrode layer has an optimum light transmission effect.

For convenience of explanation, it is assumed that each of the original slit region, the dummy slit region, and the width of each of the wire slit regions are equal. If the sum of the number of original slit regions and the dummy slit regions (Nc+Nb_s) is equal to the number of slit regions of the wires (Na_s), the transparent electrode layer has an optimum light transmission effect. Further, if it is assumed that there is no original slit region (Nc = 0), it is assumed that the width of each dummy slit region is twice the width of each of the wire slit regions. Then, if the number of dummy slit regions (Nb_s) is one-half of the number of slit regions (Na_s) of the wire, the transparent electrode layer has an optimum light transmission effect.

By calculating the density ratio parameter R, the light transmission effect of the touch panel is improved. When the number of dummy slit regions of the touch portion increases, the effect of touch sensing may be affected. Therefore, the number of dummy slit regions of the touch portion can be adjusted according to the needs of the system or application. Of course, the range of the density ratio parameter R does not need to be particularly limited. For example, the density ratio parameter R is preferably between 0.5 and 2, and the density ratio parameter R is preferably between 0.7 and 1.2.

For example, suppose you want to improve the light transmission effect of Figure 5, and assume that the density ratio parameter R is between 0.5 and 2. For convenience of explanation, it is assumed here that the width of the wire portion is 1.3 mm, the number of the wire slit regions is 14 and the width of the touch portion is assumed to be 3.0 mm.

Since the length of the lead portion and the touch portion are equal, only the width of the lead portion and the touch portion is calculated here. Furthermore, since the touch portion of FIG. 5 has five original slit regions 331c, the number N_c (N_c=5) of the original slit regions 331c is also included in the calculation.

Therefore, the number of dummy slit regions can be calculated according to the following relationship: Rmin × (Na_s / Aa) < (N_c + Nb_s) / Ab < Rmax × (Na_s / Aa) 0.5×(14/1.3)<(5+Nb_s)/3<2×(14/1.3) 16.2<(5+Nb_s)<64.6 11.2<Nb_s<59.6.

As can be seen from the previously calculated inequalities, the number of dummy slit regions is between 12 and 59.

The foregoing description assumes that the widths of the respective slit regions are equal (including the dummy slit region and the wire slit region). Therefore, the touch portion density parameter D_tp and the wire portion density parameter D_con of the foregoing examples are defined according to the number of slit regions. However, in practical applications, the width of each slit region is not necessarily equal. For example, the width of the dummy slit region of the touch portion is different from the width of the slit region of the wire at the wire portion. Alternatively, the widths of the plurality of dummy slit regions of the touch portion are not equal to each other; and the widths of the plurality of wire slit regions of the wire portion are not equal to each other.

For these cases, when calculating the touch portion density parameter D_tp and the wire portion density parameter D_con, it is necessary to further consider the width of each slit region. And, the touch portion density parameter D_tp is calculated by the sum of the total area of the dummy slit area and the total area of the original slit area; and the wire portion density parameter D_con is calculated by the total area of the wire slit area.

Please refer to FIG. 8 , which is a schematic diagram of slit regions in the touch unit having different widths. The wire portion density parameter D_con is defined as the sum of the areas of the slit regions of each wire ( ) The ratio to the wire portion area Aa. Where da_si represents the width of the slit region of each wire, Na_s represents the number of slit regions of the wire, and H represents the length of the slit region. Since the length of the slit region is substantially equal to the length of the wire portion, the wire portion area Aa = Wa × H, where Wa is the width of the wire portion. Therefore, the wire portion density parameter D_con can be defined as follows:

For the convenience of explaining the manner of defining the touch portion density parameter D_tp, the following calculation assumes that the number of original slit regions in the touch portion is 0 (Nc=0). Therefore, the touch portion density parameter D_tp is defined as: the sum of the areas of the dummy slit regions ( ) The ratio to the area of the touch area Ab . Where db_sj represents the width of each dummy slit region, Nb_s represents the number of dummy slit regions, and H represents the length of the slit region. Since the length of the slit region is substantially equal to the length of the touch portion, the area of the touch portion is defined as Ab=Wb×H, where Wb is the width of the touch portion. Therefore, the touch portion density parameter D_tp can be defined as:

For convenience of explanation, only one wire slit region 431a_s and one dummy slit region 431b_s are drawn here. However, in actual application, the number of the wire slit regions 431a_s and the dummy slit regions 431b_s is not limited. Furthermore, the number and area of the original slit area (not drawn) must also be taken into account.

Referring to FIG. 9, a schematic diagram of three touch units having dummy slit regions in accordance with the teachings of the present invention. According to the concept of the present invention, the touch unit can be repeatedly disposed and arranged on the transparent electrode layer. It is assumed here that the wires of the touch units 731, 831, and 931, the wire slit regions, and the dummy slit regions are repeatedly arranged at a pitch of 3 mm.

Each of the touch units 731, 831, 931 each corresponds to a density ratio. Therefore, the density ratio of the touch unit 731 is obtained by dividing the touch portion density parameter of the touch unit 731 by the wire portion density parameter. Similarly, the density ratios of the touch units 831 and 931 can be analogized.

The density ratios of the touch units 731, 831, and 931 do not need to be equal to each other. As long as the density ratio of the individual touch units is between 0.5 and 2, the transparent electrode layer can improve the light transmission effect and improve the visual effect of the touch screen.

Please refer to FIG. 10, which is a schematic diagram of an electronic device with a touch function. The electronic device 50 includes a controller 51 and a touch panel 54 . The touch panel 54 further includes a display layer 52 and a transparent electrode layer 53 . The controller 51 is electrically connected to the display The layer 52 and the transparent electrode layer 53 are shown. Furthermore, the display layer 52 and the transparent electrode layer 53 overlap each other. After the controller 51 receives the touch signal generated by the transparent electrode layer 53, the controller 51 controls the display layer 52 and/or other components correspondingly to perform a corresponding touch process.

Please refer to Fig. 11, which is a schematic diagram comparing the relative sensitivity to the spatial frequency of the conventional technique and the practice of the present invention. Among them, the position of the circle represents the practice of the prior art, and the square represents the practice of the present invention.

When the spatial frequency is the fundamental frequency, the user can clearly feel the difference between the conventional technology and the practice of the case. As shown in Figure 11, the conventional technique has a high contrast sensitivity. On the other hand, a touch panel having a transparent electrode layer using the method of the present invention has a small contrast sensitivity corresponding to a fundamental frequency. That is, the response of the naked eye will be moved from the visible area (Mesopic) (i.e., the Pf1 position) to the non-visible area (Photopic) (i.e., the Pf1' position). Therefore, the visual effect of the touch panel can be improved.

In the foregoing embodiment, it is assumed that the transparent electrode layer is indium tin oxide, but the material of the transparent electrode layer is not limited thereto. For example, the transparent electrode layer of the present invention may be an indium zinc oxide (IZO) or other conductive material.

In view of the above, the present invention provides a transparent electrode layer having a plurality of touch units. Each touch unit includes a wire portion and a touch portion. The appearance of the transparent electrode layer is not limited. For example, the transparent electrode layer may be a parallelogram or a polygon. Regardless of the appearance of the transparent electrode layer, the wires of the plurality of touch units extend and are parallel to one side of the transparent electrode layer. By providing a dummy slit region in the touch portion, the transparency of the transparent electrode layer can be improved, and the visual effect of the user viewing the touch panel is also improved.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

431‧‧‧Touch unit

431a‧‧Lead Department

431a_s‧‧‧Wire slit area

431a_c‧‧‧ wire

431b‧‧‧ Touch Department

431b_s‧‧‧Dummy slit area

431c‧‧‧ original slit area

TX‧‧‧Transmission Sensing Area

RX‧‧‧ receiving sensing area

Claims (17)

A transparent electrode layer includes a plurality of touch units, and a first touch unit of the touch units includes: a touch portion having at least one dummy slit region; and a wire portion electrically connected to the touch The control portion, wherein the wire portion comprises at least one wire and at least one wire slit region which are staggered, and one density parameter is determined by dividing a touch portion density parameter by a wire portion density parameter between 0.5 and 2. The transparent electrode layer of claim 1, wherein the light transmissive effect of the touch portion is close to the light transmissive effect of the wire portion. The transparent electrode layer of claim 1, wherein the touch portion comprises a transfer sensing region and a receiving sensing region, wherein a capacitance change between the transmitting sensing region and the receiving sensing interval A resistance change or a voltage change is generated corresponding to a touch point. The transparent electrode layer of claim 1, wherein the transparent electrode layer is a parallelogram or a polygon, wherein the at least one wire extends in parallel to the parallelogram or one side of the polygon. The transparent electrode layer of claim 1, wherein the touch panel is a rectangle, and one of the first side and the third side of the rectangle are parallel to each other, and the second side of the rectangle And a fourth side edge parallel to each other, wherein the first side edge is perpendicular to the second side edge, and the at least one wire extends from a direction closer to the first side edge near the fourth side edge. The transparent electrode layer of claim 5, wherein the touch units are arranged in an array of M columns and N rows. The transparent electrode layer of claim 6, wherein among the M touch units in the same row, the number of at least one wire slit region of the second touch unit adjacent to the second side is greater than The number of at least one wire slit region of the third touch unit adjacent to one of the fourth sides. The transparent electrode layer of claim 7, wherein the number of at least one dummy slit region of the second touch unit is greater than the number of at least one dummy slit region of the third touch unit. The transparent electrode layer of claim 6, wherein among the M touch units in the same row, a wire portion of the fourth touch unit closest to the second side has M wires and M wire slit regions, one wire portion of the fifth touch unit closest to the fourth side has a wire and a wire slit region. The transparent electrode layer of claim 1, wherein the area of the touch portion is larger than the area of the wire portion. The transparent electrode layer of claim 1, wherein the wires are parallel to each other, and the wires exhibit a wavy appearance. The transparent electrode layer of claim 1, wherein the wire portion density parameter is a ratio of the number of the at least one wire slit region to the area of the wire portion; and the touch portion density parameter is The ratio of the number of at least one dummy slit region to the area of the touch portion. The transparent electrode layer of claim 11, wherein the wire portion density parameter is a ratio of a total area of the at least one wire slit region to an area of the wire portion; and the touch portion density parameter is a ratio of a total area of the at least one dummy slit region to an area of the touch portion. A touch panel includes: a display layer; and a transparent electrode layer disposed above the display layer, the transparent electrode layer includes: a plurality of touch units, and a first touch unit of the touch units The method further includes: a touch portion having at least one dummy slit region; and a wire portion electrically connected to the touch portion, wherein the wire portion includes at least one wire and at least one wire slit region staggered, and A touch portion density parameter is determined by dividing a wire portion density parameter by a density parameter between 0.5 and 2. The touch panel of claim 14, wherein the wire portion density parameter is the number of the at least one wire slit region and the a ratio of an area of the wire portion; and the touch portion density parameter is a ratio of the number of the at least one dummy slit region to the area of the touch portion. The touch panel of claim 14, wherein the wire portion density parameter is a ratio of a total area of the at least one wire slit region to an area of the wire portion; and the touch portion density parameter is a ratio of a total area of the at least one dummy slit region to an area of the touch portion. An electronic device comprising: a touch panel comprising: a display layer; and a transparent electrode layer disposed above the display layer, the transparent electrode layer comprising: a plurality of touch units, wherein the touch units are The first touch unit includes: a touch portion having at least one dummy slit region; and a wire portion electrically connected to the touch portion, wherein the wire portion includes at least one wire and at least one wire staggered The slit region is determined by dividing a touch portion density parameter by a wire portion density parameter, wherein a density parameter is between 0.5 and 2; and a controller electrically connected to the touch panel performs a Touch process.